Lumberjack Custom LogFormatter

CustomLogFormatter

public class CustomLogFormatter: DDDispatchQueueLogFormatter {
    // MARK: Constants
    static let kShortDateFormat = "HH:mm:ss.SSS"
    static let kLongDateFormat  = "yyyy-MM-dd HH:mm:ss.SSS"
    
    let loggerType: LoggerType
    let threadUnsafeDateFormatter: NSDateFormatter
    
    public init(loggerType: LoggerType) {
        self.loggerType = loggerType
        self.threadUnsafeDateFormatter = NSDateFormatter()

        super.init()

        configureDateFormatter(self.threadUnsafeDateFormatter)
    }

    override public func configureDateFormatter(dateFormatter: NSDateFormatter!) {
        dateFormatter.formatterBehavior = .BehaviorDefault
        dateFormatter.dateFormat = (self.loggerType == .TTY) ? CustomLogFormatter.kShortDateFormat: CustomLogFormatter.kLongDateFormat
        dateFormatter.locale = NSLocale(localeIdentifier: "en_US_POSIX")
        dateFormatter.calendar = NSCalendar(calendarIdentifier: NSCalendarIdentifierGregorian)
    }

    override public func stringFromDate(date: NSDate!) -> String! {
        return threadUnsafeDateFormatter.stringFromDate(date)
    }
    
    override public func formatLogMessage(logMessage: DDLogMessage!) -> String! {
        let dateAndTime = self.stringFromDate(logMessage.timestamp)
        
        let logLevelLetter: String
        switch logMessage.flag {
            case DDLogFlag.Error:    logLevelLetter = "E"
            case DDLogFlag.Warning:  logLevelLetter = "W"
            case DDLogFlag.Info:     logLevelLetter = "I"
            case DDLogFlag.Debug:    logLevelLetter = "D"
            case DDLogFlag.Verbose:  logLevelLetter = "V"
            default:                 logLevelLetter = "?"
        }
        
        let queueThreadLabel = self.queueThreadLabelForLogMessage(logMessage)
        
        let formatterLogString: String
        
        switch self.loggerType {
            case .TTY, .File:
                formatterLogString = "\(dateAndTime) [\(queueThreadLabel)] |\(logLevelLetter)| [\(logMessage.fileName) \(logMessage.function)]#\(logMessage.line): \(logMessage.message)"
            case .ASL:
                formatterLogString = "[\(queueThreadLabel)] |\(logLevelLetter)| \(logMessage.fileName): \(logMessage.message)"
            case .Crashlytics:
                formatterLogString = "|\(logLevelLetter)| [\(queueThreadLabel)] [\(logMessage.fileName) \(logMessage.function)]#\(logMessage.line): \(logMessage.message)"
        }
        
        return formatterLogString
    }
}